WO2006056714A1 - Electric braking device for vehicles - Google Patents

Electric braking device for vehicles Download PDF

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Publication number
WO2006056714A1
WO2006056714A1 PCT/FR2005/050974 FR2005050974W WO2006056714A1 WO 2006056714 A1 WO2006056714 A1 WO 2006056714A1 FR 2005050974 W FR2005050974 W FR 2005050974W WO 2006056714 A1 WO2006056714 A1 WO 2006056714A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
braking
brake
modules
vehicle
Prior art date
Application number
PCT/FR2005/050974
Other languages
French (fr)
Inventor
Laurent Bellego
Original Assignee
Renault S.A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR0452756A priority Critical patent/FR2878215B1/en
Priority to FR0452756 priority
Application filed by Renault S.A.S. filed Critical Renault S.A.S.
Publication of WO2006056714A1 publication Critical patent/WO2006056714A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive

Abstract

The invention relates to an electric braking device for a vehicle. The inventive device comprises: front wheel (4a, 4b) and/or rear wheel (4c, 4d) braking modules which are not powered when the vehicle is in the standby state; at least one on-board computer (1); at least one user control module (2, 3) which, upon the user's request, delivers a power supply control signal (Sc1, Sc2) in order to control the power supply to the braking modules and braking control signals (S2a, S2b; S3a, S3b) in order to activate the braking modules when said modules are powered; and means for cutting the power supply to the braking modules once the vehicle has zero speed and the wheels are immobilised under the action of the braking modules. The invention can be used to reduce the power consumption of vehicles.

Description


  ELECTRIC BRAKE DEVICE FOR A VEHICLE

[0002] Technical field and prior art

The invention relates to an electric braking device for a vehicle and, more particularly, an electric braking device for a vehicle that manages the standby (engine off) and wake up phases of the braking system.

[0004] Electric braking systems for vehicles of the known art comprise a large number of electrical and electronic modules. In the future, electric vehicle braking systems, now known as "X-By-Wire" systems, will be increasingly complex systems in which the power consumption of the modules must be controlled.

   In particular, the electrical and electronic architecture of the braking systems will have to be built taking into account the electrical consumption of the standby mode (engine off). Indeed, if these consumptions were found to be too high, the battery (s) of the vehicle may (e) t to discharge, which would cause discomfort that can go until the immobilization of the vehicle.

[0005] To date, the standby and wake-up strategies are not taken into account in electric vehicle braking systems.

[0006] Presentation of the invention

The electric vehicle braking device of the invention does not have the disadvantages mentioned above.

Indeed, the invention relates to an electric braking device for a vehicle which comprises:

   - front and / or rear wheel braking modules of the vehicle, not powered when the vehicle is in a standby state,

[0009] At least one on-board computer, at least one user control module which, when requested by the user, delivers, to the on-board computer, a power control signal for controlling a power supply. front and / or rear wheel brake modules and, at the front and / or rear wheel brake modules, brake control signals for activating the front and / or rear wheel brake modules when the brake modules are energized ,

   and

- Means for cutting the power of the front and / or rear wheel brake modules when the vehicle has a zero speed and that the front and / or rear wheels of the vehicle are immobilized under the action of the modules braking.

According to a further feature of the invention, the user control module comprises at least one sensor adapted to detect a pressure of the user on a contact element.

According to yet another feature of the invention, a contact element is constituted by the brake pedal of the vehicle or by a contact located on the dashboard of the vehicle.

According to yet another feature of the invention,

   the contact located on the dashboard of the vehicle is a button or a pallet.

According to yet another feature of the invention, in the case where the electric braking device comprises front wheel braking modules and rear wheel braking modules, the brake control signal delivered to the braking module left front wheel is additionally delivered to the left rear wheel brake module, and the brake control signal supplied to the right front wheel brake module is further delivered to the right rear wheel brake module.

According to yet another feature of the invention, in the case where the electric braking device comprises front wheel braking modules and rear wheel braking modules,

   the device comprises a first user control module and a second user control module, the brake control signal delivered by the first user control module to the left front wheel brake module is further supplied to the rear wheel brake module. right, the brake control signal output from the first user control module to the right front wheel brake module is further supplied to the left rear wheel brake module, the brake control signal output from the second control module. the left front wheel brake module is additionally delivered to the right rear wheel brake module,

   and the brake command signal supplied by the second user control module to the right front wheel brake module is further supplied to the left rear wheel brake module.

According to a further feature of the invention, in the case where the electric braking device comprises front wheel braking modules and rear wheel braking modules, the device comprises a first user control module and a second user control module, the brake control signal supplied by the first user control module to the left front wheel brake module is further delivered to the left rear wheel brake module,

   the brake command signal supplied by the first user control module to the right front wheel brake module is further supplied to the right rear wheel brake module, the brake control signal output from the second user control module to the left front wheel brake module is additionally delivered to the left rear wheel brake module, and the brake control signal output from the second user control module to the right front wheel brake module is additionally delivered to the rear wheel braking right.

According to yet another feature of the invention, the device further comprises

   means for detecting a degraded mode of braking operation of the vehicle in operating condition or in on-off mode and means capable of enabling the braking of the vehicle in working order or on-off mode using the user command when a degraded mode of operation is detected.

According to yet another feature of the invention, the device comprises a communication network for allowing the braking means to communicate with each other in order to confirm that a request for braking the vehicle using the user control module. is required and, if the braking demand is confirmed,

   means for maintaining the stability of the vehicle when the braking of the vehicle is implemented.

Brief description of the figures

Other features and advantages of the invention will appear on reading the description which follows, with reference to the appended figures among which:

[0021] - Figure 1 shows an electric braking device for a vehicle according to a first embodiment of the invention; FIG. 2 represents an electric braking device for a vehicle according to a second embodiment of the invention;

[0022] - Figure 3 shows a first improvement of the electric braking device according to the invention;

   FIG. 4 represents a second improvement of the electric braking device according to the invention;

[0023] - Figure 5 shows a third improvement of the electric braking device according to the invention.

In all the figures, the same references designate the same elements.

Detailed description of embodiments of the invention

[0026] Figure 1 shows an electric braking device for a vehicle according to a first embodiment of the invention.

The braking system comprises a central module 1, two user control modules 2 and 3 and a set of braking modules 4a, 4b, 4c, 4d.

The central module 1 is, for example, an on-board computer equipped with a power supply device.

   In a manner known per se, each of the braking modules 4a, 4b, 4c, 4d comprises, inter alia, an electric motor, a gear and a control electronics. The braking modules 4a and 4b are associated with the two front wheels of the vehicle and the braking modules 4c, 4d are associated with the two rear wheels. The user control modules 2 and 3 are both connected to the central module 1 and to the braking modules of the front wheels 4a, 4b. Power lines La and Lb connect the supply device contained in the central module 1 to the respective modules 4a and 4b.

   In order to avoid the establishment of common modes on the lines La and Lb, these are connected to two separate outputs of the central module 1.

The user modules 2 and 3 are control devices of the brake modules 4a and 4b when the vehicle is in a standby state (engine off). The user modules 2 and 3 control the brake modules 4a and 4b by means of, respectively, the brake pedal and a contact located on the dashboard of the vehicle (button, paddle, etc.). When the driver of the vehicle establishes a pressure on the brake pedal, the control module 2 delivers brake control signals S2a and S2b to the respective brake modules 4a and 4b and a power control signal ScI to the central module 1 .

   The module 2 may be, for example, an on-off contact device which delivers the signals S2a, S2b and ScI in the form of binary information whose first state indicates that the contact is established with the brake pedal and a second state that no contact is established with the brake pedal.

Other forms of signals, comprising for example more than two states, can also be delivered by the module 2.

Similarly, when a pressure is applied on the contact of the user module 3, the latter delivers braking control signals S3a and S3b to the respective brake modules 4a and 4b and a power control signal Sc2 to central module 1.

   Preferably, the signals delivered by the module 3 are also binary signals.

When the vehicle is in standby, only the central module 1 is powered. According to the first embodiment of the invention, the central module 1 directly manages the supply of braking modules 4a, 4b of the front wheels. The signals Sc1 and / or Sc2 enable the central module 1 to detect the loading of the user control modules 2 and / or 3. Under the action of the signals Sc1 and / or Sc2, the central module 1 supplies the braking modules 4a accordingly. and 4b.

   Under the action of the signals S2a, S2b and / or S3a, S3b, and because of their supply, the braking modules 4a and 4b then tighten the brakes associated with them, thus allowing the vehicle to be immobilized, and then lock the position brake pads to maintain the applied force. With the parking brake thus activated, the power supply of the modules 4a and 4b is then cut off.

FIG. 2 represents a second embodiment of the invention in which the supply A of the brake modules is outside the central module 1. The power supply A is then controlled by a signal Sca delivered by the central module 1 under the action of the signal ScI and / or signal Sc2.

   FIGS. 3-5 show different exemplary embodiments of the invention in which the signals Sc1 and / or Sc2 are applied not only to the braking modules of the front wheels 4a, 4b, but also to the braking modules of the rear wheels 4c, 4d. . For reasons of convenience, the power lines that connect the central module 1 to the braking modules of the rear wheels 4c and 4d are not shown. Such feed lines exist, however, and their configuration is in accordance with the configuration of the feed lines La and Lb of FIG. 1 or 2.

FIG. 3 represents an exemplary configuration in which each module 2, 3 has two additional outputs. The signals S2a and S2b are then delivered to the two additional outputs of the module 2 and transmitted to the respective modules 4c and 4d.

   Likewise, the signals S3a and S3b are delivered on the two additional outputs of the module 3 and transmitted to the respective modules 4c and 4d.

FIG. 4 represents an exemplary configuration in which:

The signal S2a transmitted to the module 4a is also transmitted to the module 4d and the signal S2b transmitted to the module 4b is also transmitted to the module 4c,

   and

The signal S3a transmitted to the module 4a is also transmitted to the module 4d and the signal S3b transmitted to the module 4b is also transmitted to the module 4c.

Such a configuration is called "diagonal configuration" in that the braking modules 4a and 4b are associated with the respective left and right front wheels and the braking modules 4c and 4d associated with the respective rear wheels right and left.

FIG. 5 represents an exemplary configuration in which:

  

[0040] the signal S2a transmitted to the module 4a is also transmitted to the module 4c and the signal S2b transmitted to the module 4b is also transmitted to the module 4d, and

The signal S3a transmitted to the module 4a is also transmitted to the module 4c and the signal S3b transmitted to the module 4b is also transmitted to the module 4d.

Such a configuration is called "right / left configuration" to the extent that the braking modules 4a and 4b are associated with the respective left and right front wheels and the braking modules 4c and 4d associated with the respective right and left rear wheels .

When a vehicle is running (that is to say when the driver started the engine), the braking of the vehicle is effected in a manner known per se via the brake pedal.

   Sensors placed on the brake pedal and which are powered only when the engine is running or when the engine stopping conditions are realized in on-off mode, commonly known as "Start & Stop" mode (engine shut off) but still available), can detect, on the one hand, information of position or pedal excursion and, secondly, information on the force exerted on the pedal. In certain degraded modes of operation, the information from these sensors is not exploitable.

   An advantage of the invention is then to allow braking the vehicle with the information from modules 2 and / or 3.

To this end, the braking device according to the invention comprises means for detecting a degraded mode of operation of the braking means of the vehicle in working condition or in "Start and Stop" mode and means for braking the vehicle in working condition using the user control means when a degraded mode of operation is detected.

   Preferably, the braking device then comprises a communication network which allows the braking modules 4a, 4b and, possibly, 4c and 4d, to communicate with each other to confirm the braking demand and means for maintaining the stability of the vehicle when the braking is implemented.

The nature of the links between the control modules 2 and 3 and the braking modules 4a-4d covers a wide range of possibilities. The links can be, for example, wired links or non-wired links (CAN, LIN, "Time trigger", etc.).

Advantageously, the invention adapts to a large number of power networks.

   It may be a 14V network, for example with two 12V batteries, a dual 14V / 42V network, for example with a 12V battery and a 36V battery, or a 42V network, for example with two 36V batteries.

On all the figures of the application, the braking device according to the invention comprises front wheel braking modules 4a, 4b and rear wheel braking modules 4c, 4d. The invention also relates to the cases where the braking device comprises only front wheel braking modules or rear wheel braking modules. It is for the sake of convenience that these other embodiments are not shown in the figures of the application.

Claims

1. Electric braking device for a vehicle, the device comprising: - braking modules of the front wheels (4a, 4b) and / or rear wheels (4c, 4d) of the vehicle, not powered when the vehicle is in a standby state,
at least one on-board computer (1),
at least one user control module (2, 3) which, when it is requested by the user, delivers, to the on-board computer (1), a power control signal (ScI, Sc2) for controlling a supplying front and / or rear wheel brake modules and brake control signals (S2a, S2b; S3a, S3b) to the front (4a, 4b) and / or rear (4c, 4d) brake modules; ) to activate the front and / or rear wheel brake modules when the brake modules are powered, and
- Means for cutting the power of the front and / or rear wheel brake modules when the vehicle has a zero speed and that the front and / or rear wheels of the vehicle are immobilized under the action of the brake modules.
2. Device according to claim 1, wherein the user control module (2, 3) comprises at least one sensor adapted to detect a pressure of the user on a contact element.
3. Device according to claim 2, wherein a contact element is constituted by the brake pedal of the vehicle or by a contact located on the dashboard of the vehicle. 4. Device according to claim 3, characterized in that the contact located on the dashboard of the vehicle is a button or a pallet.
5. Device according to any one of the preceding claims in the case where it comprises front wheel braking modules and rear wheel braking modules, characterized in that the brake control signal (S2a, S3a) delivered to the left front wheel brake module is additionally delivered to the left rear wheel brake module, and the brake control signal (S2a, S3a) delivered to the right front wheel brake module is additionally delivered to the brake module of right rear wheel.
6. Device according to any one of claims 1 to 4 in the case where it comprises front wheel braking modules and rear wheel braking modules, characterized in that it comprises a first user control module (2). ) and a second user control module (3), the brake control signal
(S2b) issued by the first user control module
(2) to the left front wheel brake module (4b) is additionally delivered to the right rear wheel brake module
(4c), the brake control signal (S2a) supplied by the first user control module (2) to the right front wheel brake module (4a) is further delivered to the left rear wheel brake module (4d) the brake control signal (S3b) supplied by the second user control module (3) to the left front wheel brake module (4b) is further supplied to the right rear wheel brake module (4c), and the brake control signal (S3a) delivered by the second user control module (3) to the right front wheel brake module (4a) is further supplied to the left rear wheel brake module (4d).
7. Device according to any one of claims 1 to 4 in the case where it comprises front wheel braking modules and rear wheel braking modules, characterized in that it comprises a first user control module (2 ) and a second user control module (3), the brake control signal (S2b) delivered by the first user control module (2) to the left front wheel brake module (4b) is further delivered to the control module (3). left rear wheel braking (4d), the brake control signal (S2a) delivered by the first user control module (2) to the right front wheel brake module (4a) is further delivered to the wheel braking module rear right (4c), the brake control signal (S3b) delivered by the second user control module (3)
 to the left front wheel brake module (4b) is further supplied to the left rear wheel brake module (4d), and the brake control signal (S3a) delivered by the second user control module (3) to the module the right front wheel brake (4a) is further supplied to the right rear wheel brake module (4c).
8. Device according to any one of the preceding claims, characterized in that it further comprises means for detecting a degraded mode of operation of braking means of the vehicle in running state or in on-off mode and means capable of braking the vehicle in running state or on-off mode with the user control module (2, 3) when a degraded mode of operation is detected.
9. Device according to claim 8, characterized in that it comprises a communication network to allow the braking modules to communicate with each other to confirm that a braking request of the vehicle using the user control module ( 2, 3) is required and, if the braking demand is confirmed, means for maintaining the stability of the vehicle when the braking of the vehicle is implemented.
PCT/FR2005/050974 2004-11-25 2005-11-21 Electric braking device for vehicles WO2006056714A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0452756A FR2878215B1 (en) 2004-11-25 2004-11-25 Electric brake device for vehicle
FR0452756 2004-11-25

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11/720,153 US9020724B2 (en) 2004-11-25 2005-11-21 Electric braking device for vehicles
EP20050819399 EP1817218B1 (en) 2004-11-25 2005-11-21 Electric braking device for vehicles
DK05819399T DK1817218T3 (en) 2004-11-25 2005-11-21 Electric braking device for vehicles
DE200560007630 DE602005007630D1 (en) 2004-11-25 2005-11-21 Electric braking device for vehicles
JP2007542067A JP5288803B2 (en) 2004-11-25 2005-11-21 Automotive electric brake equipment

Publications (1)

Publication Number Publication Date
WO2006056714A1 true WO2006056714A1 (en) 2006-06-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2005/050974 WO2006056714A1 (en) 2004-11-25 2005-11-21 Electric braking device for vehicles

Country Status (9)

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US (1) US9020724B2 (en)
EP (1) EP1817218B1 (en)
JP (1) JP5288803B2 (en)
AT (1) AT398559T (en)
DE (1) DE602005007630D1 (en)
DK (1) DK1817218T3 (en)
ES (1) ES2306269T3 (en)
FR (1) FR2878215B1 (en)
WO (1) WO2006056714A1 (en)

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US9731721B1 (en) 2016-02-11 2017-08-15 Fca Us Llc Line lock braking system and method for a vehicle
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Also Published As

Publication number Publication date
JP5288803B2 (en) 2013-09-11
ES2306269T3 (en) 2008-11-01
DK1817218T3 (en) 2008-09-29
US20080015761A1 (en) 2008-01-17
EP1817218A1 (en) 2007-08-15
FR2878215B1 (en) 2007-01-05
EP1817218B1 (en) 2008-06-18
AT398559T (en) 2008-07-15
FR2878215A1 (en) 2006-05-26
DE602005007630D1 (en) 2008-07-31
JP2008521678A (en) 2008-06-26
US9020724B2 (en) 2015-04-28

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